The Double K Equal Vent is a compact equalization training tool for freedivers who want to practise pressure equalization outside the water

Five depth sessions are included

Freedivers learning Frenzel

Backpack straps are strategically spaced to prevent neck chafing

Personal briefing required

C4 Carbon - D&D – Collar Deep and Dynamic 1,6 Kg camera The Double K Equal VentC4 Carbon D&D Collar Deep and Dynamic 1,6 Kg The new D&D collar (Deep and Dynamic) designed to meet the needs of both deep diving and dynamic disciplines. A collar engineered to deliver excellent performance in both disciplines, eliminating the need to purchase two separate products. D&D Modular Freediving Neck Weight The new D&D collar (Deep and Dynamic) represents a unique innovation in the world of freediving, designed to meet the needs of both